Home / 20,489.84-28,278.72-11,994.56

Finding the Fourth Proportional to 20,489.84, 28,278.72 and 11,994.56

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Solution

The fourth proportional to 20,489.84, 28,278.72 and 11,994.56 is: 16,554.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.84 : 28,278.72 = 11,994.56 : x
  2. Step 2: Convert to fraction form
    20,489.84/28,278.72 = 11,994.56/x
  3. Step 3: Cross multiply
    20,489.84x = 28,278.72 × 11,994.56
  4. Step 4: Simplify right side
    20,489.84x = 339,190,803.76
  5. Step 5: Solve for x
    x = 339,190,803.76/20,489.84
  6. Step 6: Final answer
    x = 16,554.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.